Vacuum cleaner



FIG. 1 is a perspective view of a vacuum cleaner, showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left-side view thereof;

FIG. 5 is a right-side view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines illustrating portions of the vacuum cleaner are for environmental purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a vacuum cleaner, as shown and described. 